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Multiple synthesis by the multipin method as a methodological tool

A M Bray1, R M Valerio, A J DiPasquale

  • 1Chiron Mimotopes Pty Ltd, Victoria, Australia.

Journal of Peptide Science : an Official Publication of the European Peptide Society
|January 1, 1995
PubMed
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The multipin method enables rapid, parallel peptide synthesis for comparative studies. Different N-terminal protecting groups for asparagine were evaluated, with Fmoc-Asn(Tmob)-OH showing the highest reagent efficiency for peptide purity.

Area of Science:

  • Organic Chemistry
  • Medicinal Chemistry
  • Biotechnology

Background:

  • The multipin method offers a powerful approach for synthesizing numerous peptides simultaneously.
  • High-throughput screening and comparative studies are crucial in peptide-based research and drug discovery.

Purpose of the Study:

  • To evaluate the efficiency of the multipin method for concurrent peptide synthesis.
  • To compare different reagent combinations and coupling times for peptide synthesis.
  • To assess the impact of various N-terminal asparagine protecting groups on coupling efficiency and final peptide purity.

Main Methods:

  • Simultaneous synthesis of multiple peptides using the multipin method.
  • Utilized two distinct reagent systems: Fmoc-Axx/BOP/HOBt/NMM and Fmoc-AXX/HATU/HOAt/NMM.

Related Experiment Videos

  • Analyzed synthesized peptides via high-throughput ion spray mass spectrometry and reverse-phase High-Performance Liquid Chromatography (HPLC).
  • Investigated N-terminal coupling of five different Fmoc-protected asparagine derivatives.

    • Main Results:

    • Both reagent combinations yielded comparable results in initial peptide synthesis.
    • Fmoc-Asn(Tmob)-OH demonstrated superior efficiency in N-terminal coupling, leading to higher peptide purity.
    • Peptide purity rankings for N-terminal asparagine derivatives were: Fmoc-Asn(Tmob)-OH > Fmoc-Asn-OH > Fmoc-Asn(Mtt)-OH = Fmoc-Asn(Trt)-OH > Fmoc-Asn(Mbh)-OH.

    Conclusions:

    • The multipin method is highly effective for conducting parallel comparative peptide synthesis.
    • The choice of N-terminal asparagine protecting group significantly impacts coupling efficiency and peptide purity.
    • Fmoc-Asn(Tmob)-OH is recommended for optimal N-terminal asparagine coupling in Fmoc-based solid-phase peptide synthesis using the multipin method.